William d



w. n'. Bumm.

ART 0F FORMING CONCRETE WALLS.

APPLICATION FILED NOV. 4. I9I8.

935,68?, Patented June 3,1919.

wiLLIAi/r n. isUaGIN, or 101mm, Missouri.

ART or romaine coNcnETE WALLS.

Y To `aZ-Z whom t may concern.'

Be it known that I, WILLiAM D. B'tmGiN, a citizen ofthe United States, residing at Joplin, in the countyof Jasper and State of Missouri, have invented certain new and useful Improvementsin the Art of Forming Concrete Walls, of which the following is a specification, reference `being had to the ac companying drawings. Y'

This invention relates to the art of building cement walls, and particularly to the mannerof building a cement wall withVY an insulated space within Vthe wall to prevent the wallfrom sweating.

The general object of the invention is to provide a method of and apparatus for building a wall of this character which is very easily applied and .whereby a wall may be built both expeditiously'and cheaply.

A further obj ect is to provide for building a wall of this character in such manner that the space between the outer surfacesrof the Wall may be filled with slag or other granular material as the wall is built and before the cement sets, this granular material in the insulating space permitting the form in which the cement is cast to be raised before the cement entirely sets.

A further object in this connection is to provide means whereby the granular material may be drawn away in case it be desired to leave the wall an air space.i

, Other objects will appear in the course Vof theV following description.

My invention is illustrated in the accompanying drawings, wherein l Figure 1 is a horizontalsectional view of a wall constructed in accordance with my invention showing in plan the foundation upon which the wall rests;

Fig. V2 is a horizontal section on an enlarged scale;

Fig. 3 is a vertical transverse section through the wall;

Fig. 4 is a horizontal section showing the complete wall with tie bars used in place of studding and with the slag removed; and

Fig. 5 is a fragmentary top plan view of two coacting forms used in building a wall without joists.

In Fig. 1, l illustrate a plan view partly in section of a portion of a wall constructed in accordance with my invention and in this figure, 10 designates the foundation of the wall, and 11 joists or like structural members disposed at intervals upon the founda- Specification of Letters Patent..

' Patent-ed June 3, 1919.

Application sled November 4, 191s. serial 510.260.989.

tion. Assumin that the space between these joists is to be lled with'conc'rete andthat an interior insulating space is to be left within each concrete pier disposedbetween the joists 11, then the-procedure'is-as follows Between each pair of joistsare disposed the sheet iron forms 12 which are as long as the space between the joists.Y rlhese forms are disposed between the joists so that they are spaced from each other a distance equal to the width of the insulating space which is to be left within the walls and spreaders 14 are disposed between these forms 12 so as to separate the forms, these spreaders being preferably integral with the forms. Form boards or like members 15 are disposed against the interior edges Vof Vthe studding 11. Metallic slag or other granular material 16 is now filled into the space' between the forms 12 up to the top of VVthe forms and then concrete 17 in liquid, or

As soon as the top of the forms 12 have been reached, that is, as soon as the top of the concrete is level with the top of the slag, the forms 12 are raised to the top ofthe concrete and the process repeated untilthe top of the studding is reached or'until the desired height is reached. This is done without waiting for the concrete to set, for the reason that the granulated slag will not unite with the concrete when the forms are raised, and later on this granular filling which, as before stated, is preferably metal slag, may be removed by means Vof an opening left at the bottom Vof the wall for this purpose. The metallic slag or other granular material may, however, be left in place, if so desired, and if soleft in place this granular material acts as a thoroughly good insulator.

The spreaders 14 may be attached to the forms 12 or may be separate therefrom but preferably they will be attached thereto. In the event that studding is not used in the building then reinforcing members 18 should be disposed transversely at intervals across the wall so as to connect the outer and inner concrete layers and bind the wall together.

It is obvious, of course, that where windowV to secure a suitable contour or configuration to the wall. The sheet uiron forms 12 are very light, may be easily' shifted and may be used over and over again, as maythe slag which is withdrawn from between the lforms 12 each time that the section of the wall has reached'the proper height. Preferably the slag which I use is lead slag, but Ido not wish to be limited to this particular' form of slag, norto lthe use of slag as other granu-A lar substances might be used, though I find that slag is thoroughly effective and is cheap because it is otherwise. a waste product.

Where awallis to be built without studding, several metal forms may be placed along the foundation with the ends lapped an inch or so. These forms slightly differ from the forms shown in Figs, 1 and 2 in that one end of the form is approximately one-fourthiinch narrower than the other end ofthe form so that the narrow end of one form4 may be inserted in the large end ofthe other form. These forms are to be about three vor four feet in lenO'th, but of course may be of 'any desired size.

As before stated, -there'may be anopening left at thebottom of the wall for lthe purpose of` removing the slag, as illustrated in Figy and in dotted lines in 2. In this caseV a mbox 19 is disposed midway between the studding, this boX having a top and two side walls. After the concrete hardens and the outside forms 15 are removed, the boxes 19 are removed andthe space plugged with a cement block. lVhen studding is not used these boxes should be placed about three or four feet apart along the foundation.

The advantages of a wall constructed in accordancerwith my invention are that the concrete does not extend from the outside surface to the inside surface of the wall and this prevents the conduction vof heat, moisture or cold through the concrete. No skilled labor need be used in ,the construction of the wall andit is obvious that the elements which go to forinthewall are of the simplest character. No complicated or expensive air space forming device is necessary and it is not necessary to use wooden studding or any particular form of studding unless desired. I have found in ,actual practice that walls maybe very expeditiously made in accordance with the above description, thattheyare relatively cheap, and that if the granulated slag is used as a filler between the outer and inner portions of the walls, the wall will be` thoroughly insulated from the effects of cold, moisture or heat.

I claim l. The method of forming hollow con rete walls which consists in disposing a hollow, open-ended inner form within Va hollow open-ended Vouter form, with the walls of both forms in vertical position, filling the space within the inner form with granular material through the uppermost openend of the inner form, filling' the spacebetween the outer and inner forms with concrete to a level with the upper surface ofthe granular material and then lifting the inner form before the concrete is set to form superposed section of wall, the granular material left between the outer and inner concrete portions of the wallV acting as a core for the concrete. 1

2. The method of forming walls which consists in disposing a hollow open-ended inner form within a hollow open-ended outer form, with the walls of the forms in yertical position, filling the inner form through its upper open end with granular material, filling the space between the inner and outer form with concrete, raising the inner form to a level with the top of the granular material, and repeating'the steps above recited to form a complete wall. 1 l

3. The method of forming hollow concrete walls which lconsists in disposing a hol-low, open-ended inner form within a hollow open-ended outer form, withthe 4.walls of both forms in vvert-ical position, filling Vthe space within the inner form wit-hgranular material Athrough the uppermost open end of the inner form, filling the space between the outer and inner forms with concrete to a level with the upper surface of thegranular material and then lifting the innerfform before the concrete is :set to form a superposed section of wall, the granular material left between the outer and inner concrete portions of the wall acting as a-core 'for the concrete, and then removing the granular material to leav an air space.

In testimony whereof I 'hereunto vaffix my signature in the presence of two witnesses.

wrLLniu n. BURGIN.

itnesses VrL-LIAM P. SoHAErER, GEORGE R. THOMPSON.

Copies ot this patent 4rnay be obtained forlve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

